Brake.



J. A. HART.

BRAKE.

AIPLIOATIOH FILED M124. 1910.

997,290, v Patented July 11, 1911.-

COLUMBIA PLANOCIRAPH Cb WASHINGTON. D.

[UNITED STATES PATENT OFFICE.

BRAKE.

Specification of Letters Patent.

Patented July 11, 191 1.

Application filed May 24, 1910. Serial No. 563,117.

To all whom it may concern:

Be it known that I, JAMES A. I'IART, a citizen of the United States,residing at Trenton, in the county of Mercer and State of New Jersey,have invented new and useful Improvements in Brakes, of which thefollowing is a specification. I

This invention relates to improvements in band brakes and isparticularly designed for use with motor vehicles, electric cars and thelike.

One object of the invention is the provision of an improved means .forforcing the surface of the friction band into engagement with the drum.r

'Another object is the pro-vision of an improved form of friction bandand meansifor suspending the same. i i Y lVith these and other objectsin view, which will more fully hereinafter appear, the present inventionconsists in certain novel details of construction and arrangement ofparts, hereinafter fully described, illustrated in the accompanyingdrawings and more particularly pointed out in the appended claim; itbeing understood that various changes in the form, proportion, size, andminor details of the device may be made, within the scope of theappended claim, without departing from the spirit or sacrificing anyof'the advantages of the invention.

In the accompanying drawings, forming part of the specification ;"Figure1 is a side elevation of a wheel showing my improved device appliedthereto. Fig. 2 is an end view showing a portion-of the support for thefriction band. Fig. 3 is a detail perspective of the opposite endportions of the friction band. Fig. 1 is a similar view of the means forcontracting the friction band.

Similar numerals of reference are employed to designate correspondingparts throughout.

The wheel is designated by the numeral 5 and integrally or otherwisesecured to the inner surface of the wheel is a circular drum 6, the drum6 being considerably less in diameter than the diameter of the wheel anddisposed concentric with the latter.

Extending transverse the frame of the car or vehicle to which thedevice'is applied is a supporting bar 7, this supporting bar extendingto a point approximately at the middle of the upper rear segment of thewvheel. The supporting bar 7 may be secured in any preferred manner, andwhile I have shown but one end extending to a point adjacent the wheelshown, it must be understood when a brake is employed for each wheel ofthe car or vehicle the total number of supporting bars will correspondto the number of wheel axles, the opposite ends of said supporting barsextending to points adjacent the inner surfaces of the wheels beforedescribed.

The friction band is designated by "the numeral 8 and as usual is splitand expanded to a diameter a trifle greater than the diameter of thedrum 6, thus permitting the friction band to embrace the drum and tonormally slightly bear on the periphery of said drum. o

By reference now to the drawings it will be seen that the friction band,adjacent to one end is provided on its outer surface with a radiallyperforated lug 9, which receives one end of the bar 7, and formed on theouter face of the band and between the lug 9 and the adjacent end of theband is a radially extending shaft or stud 10.

The means for contracting the friction band is shown to include acircular disk 11, of suitable diameter having an eccentric opening 12 toreceive the stud or shaft 10, the said stud or shaft 10 beingconsiderably greater in length than the thickness of the disk and anysuitable means may be employed with that portion of the stud or shaftextending beyond the disk to secure the said disk against displacement,and to permit turning movement of'said disk.

Extending radially from one face'of the disk is a hook 13, the hook 13extending to a point over the opposite end of the band and engages witha U-shaped keeper 14: formed on that end of the band opposite to the endon which the stud or shaft 10 is formed, as clearly shown in thedrawings. Extending radially from the disk and at a point adjacent tothe hook 13 is an arm 15, the free end of which is provided with an eye16'which receives the end of a connecting rod (not shown) operable bythe foot lever or operating rod (not shown). With this construction itwill be manifest, owing to the eccentric mounting of the disk, that whenthe arm 15 is turned in one direction the hook 13 will move that end ofthe band to which it is attached, toward the opposite end of the band,whereupon the band will be contracted and bind on the drum 6, thuseffecting an application of the brakes.

It will be obvious when the device just described is applied to all thewheels of a car or vehicle that the arms 15 may, by suitable mechanismbe connected to move sinniltaneously, thus effecting a simultaneousapplication of the brakes to all the Wheels.

From the foregoing it is evident that I have provided a device which iscomparatively simple in structure and inexpensive in manufacture,embodying few parts and these so arranged that the danger of derangementwill be reduced to a minimum.

I claim In a brake, the combination with a support and a brake drum; ofa split band embracing the drum and secured at one end portion to thesupport, a stud located on the secured end portion of the band andextending radially with respect to the drum, a disk having an eccentricopening to freely re ceive the stud and provided with radial arms, oneof said arms having its free end portion adapted to loosely engage thatend portion of the band opposite the one to which the disk is connected,and means connected with the opposite arm serving to rock the latter,for the purpose described.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES A. HART. Vitnesses JOHN H. KAFER, LEO EISNER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

